Explosion-engine.



(INITED sTA-Tns PAIENT onirica@ `IOIIN G. UTz, OF DETROIT, MICHIGAN, 'AssIGNOR ToeHALmERs-DETROIT .MOTOR OOM- PA'NY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

EXPLOSION-ENGINE.

l Specieatioii of Letters Patent.

Patented Jan. 16,1912.`

-Apiiiicanon mea December 22, isos. .semina 468,752.

To aZZ whom it'may.no1-ideeen:y

Be it known that I, JOHN G, U'rzpacitizen of the United States Aof America, residing at Detroit, in the county of `Wayne and Statee of Michigan, have invented certain new and useful Improvements inl Explosion-Engines, of whichthe following is a specification, reference being had therein to the accompanying drawings.

The inventionrelates to explosion engines of that type in which air is compressed m the crank case and is used for the double purpose of scavenging the cylinder land for' augmenting the explosive charge.

In the operation of explosion enginesof the four-cycle type, the charge of explosive gases is limited by reason of the restriction ofthe valve ports andthe smalltime interval in which the charge must be.' drawn in. This results in reducing the pressure of the incoming gases to below atmosphere, and consequently reduces the forcel of the explosion. `The defect may4 be partially remedied by increasing the pressure of air or explosive mixture above atmospheric pressure before introducing itinto the cylinder, butl the small time interval and restricted area of the valve port still tend to limit the-quantity oi? gas introduced. Furthermore, if the combustible vgases and the compressed air are introduced into the cylinder at different points or at different times an additional valve. is required-with increased com ilication inthe mechanism. -J

Wlith the present construction, the engine is so organized as'tolsecure the easy transfer of a volume of air compressed in the crank case to the explosion chamber, and at a timeV when this chamber is fully expanded-that' V is, when the piston is near the extreme downward position of its stroke. A largely augmented cha rge is thus introduced which pro--v portioiiately increases the power of the engine. y

The invention therefore consists in the construction for accomplishing the result.,

as above specified; further inthe peculiar valve construction; and, further, in the pe.- euliar construction, arrangement and combination of parts as hereinafter set forth.

In the drawin'gsr-Figurc l is a vertical.

central section through the engine; Fi i 2, 3, 4, 5, 6, 7 and 8 are diagrammatic secti ns illustra-ting the valves in different positions4 through which ther con'ipressed air is ad- -mitted to the explosion chamber. For cou- 'trolling-these variousportsand passages, I employa sl'tle valve preferably of the piston type, w ich is'preferably-arranged to surround the *listen and intermediate the same and the leLylinder. This permits of' Aforming ports of large areawhich are valve and angular ymovement of the crank,l so that a large volume otair maybe quickly transferred from the. crank case to the cylinder. As shown,the piston valve is formed of two relatively movable concentric sleeves J J', which are of a length greater `than the trave of the piston, and which control all of th. ports l", (l, ll and l. ',lhese sleeves .are actuated IW suitable. means, such as'the connecting rods K K', which are pivotally secured to bracket arms L Ii upon the sleeves, and engagi cranks or eccentric-s lVI M oii the. shaft N. r.lliisshatt is driven from the crank shaft by ."suitablc two-to-one gcaringO, so as to complete one revolution in eaclrcycle. The cranks oreccentries M M' are pretcral'ily set, 90 apart, and so as to 'be alternately at tlie'feiid and plete stroke of the piston.'l 'lhis arrange .nient is advantageousfas it results Iin plat-.in

the greatest acceleration of the movement orone ofthe sleeves opposite the. greatest retardation of movement of the piston, thereby secnring a quick opening of the valve. ports 'at tlfieopposite ends of the piston.

The inlet port F for thc explosive mixture is contrplledby ports l respectively in the valve members J and J', and the exhaust port (lr-is correspondingly controlled by cooperating ports() Q in said members,`all

in each cycle. The air inlet port lH and H, and also ay transfer port or passage I- ipened bya relativelyl small. travel of the' of said orts beinor opened and closed once exact middle of the stroke for' each com- 55 .whole openin 'and closing 4movement of ftranstei-,P0147I'fl Preferably Opened twice theproper timing eiiect, as -will be hereinthe orts F and G., The air inlet port H In operation the parts are in the position illustrated in" Fig. lat the moment of ignition, at which point a previously admitted and compressed explosive charge is retainedin theA explosion chamber by the closure of is a soin open communication with the chamber of the crank case by the reg1stra.

tion therewith of the-ports R and R2 of thev` sleeves J and J while the-transfer port I isclosed by said sleeves.'4 During the down-.

ward 'stro efof the piston, the 'port II' is first closed 'and the. aii` which is at atmospheric pressure in the crank case' is comf pressed. At the proper 'position in the' downward strokezthe exhaust port G is opened b a relative movement of the'sleeves .J J which' bring the ports Q, and Q" into registration with each other and the' port G. Subsequentl and when'the piston has nearly complete its stroke, the ports S and- S2 will begin to register, which will permit the air coi'npressed in the crank case to pass l through. the portl I and into the cylinder vabove the .piston', thereby displacing the products of combustion by a volume of fresh cool air. Fig. 2 of the drawings ill trates the parts in a position where t e orts S and S2 are upon the point of open'- ing and it will be observed that in this position the piston is very near the completionof its downward stroke, the lowest. point being indicated by a dotted line 1--1. Fig.

3 shows the position of the ports S and afterthe piston has completed its stroke 'andf'isin the saine position on the. return f stroke asin Fig. `2. Fig. 4 illustrates the gosition of the parts when the ports S and u consequently the full working stroke of the v Vare just closed by the upward movementof the piston. Thus it will be seen that the the orts S an S2 is accomplished in a relative y short travel of the piston, and that piston is maintained. ln Fig. 5 is illustrated the position of the parts after the piston has completed the scavenging stroke, the exhaust ports Q, Q and (i being closed and the inlet ports-F, I and l" uponthe point of opening. The ports It and 1t are also .the piston descends,.`the' inlet ports--are fot-her explosive Amixture, and at {thesame the opening and closin 'being adjusted in any suitable-manner.-1 l

,above the piston.

again establish communication between' the crank case and the external atmosphere. As j opened, admitting the carbureted air or time the Orts R and It are cut offbythe piston anA compressed. When .the lpiston reaches the.; same position, as illustrated in F iig', the .7`5 ports S andS begin to open, as il u 1n Fig. 6, and inFigs. 7 and 8,'which coi;- respond to the position of the piston in Figs. 3 and 4:,A said ports S and S',` are opened'and again closed. Thus, it will be observed thatygg of these; portsgS.. and S is in the same re ation tothenio've'- nient of the piston as the openingand clos-1 ing of the ports S 'and S2 1n the first-half of the cycle. While these portsare'opened, as

the compressed air in the-gcrankcase, 1s

transferred to the' cylinder` above thep istonf l. and is commingled with the pieviol1sl" ad mitted carburcted air entering throng "1r-the, ports a-Piand 11", the Alattenliavingibee` closed to prevent expulsion o f the: charg Upon the upward-.stroke of thepist'omthe augmented charge is compressed 4 andis nited when the part-.s are again inguthe"posi tion illustrated 1n Fig. 1.

If desired the port-H may befjcontrolled by a valve Z so as to vary the@timountfotx anl admitted through said port, thevalve Z What I claim as my invention flsr'f A'1.00 1. In an explosion engine, the combina-N tion of a crank case forming a chamber, a cylinder, a piston therein, and a plurality of differentially moving ported sleeves sur-.f rounding said piston and contro1lingcom4 '105 munication between said crank case and cylv inder above the piston. v

" 2. In an explosion engine, the combination cfa cylinder having inlet andexhaust ports, a crank ease forming a compression 11o4 chamber, a piston in said cylinder, a plurality of diiterentially moving ported sleeves surrounding said piston and controlling said inlet. and exhaust ports and communication between' saidcrank vcase and 4saidcylinder 115 3. In an explosionv engine, the combination of a cylinder, having inlet and exhaust ports, a crank case' forming a compression chamber, a piston in said cylinderfazplu- 'rality of portedi sleeves surrounding. said piston, and means for actuating said sleeves to'open and close said inlet and exhaust. ports each once during the cycle and to open communication between said crank .case and cylinder. twice during the cycle.

4. ln un explosion engine, the. combination of a casing forming a cylinder, and a closed crank case constituting the 'compression chamber, said casing being provided'lo 11o the air in the crankvcase is again strated i miam with exhaust, inlet and transfer ports, a piston 1n said cylinder, and a slide valve intermediate the piston and eyhnder havi ing ports coperating with said lirst'iinentioned ports and timed in its operation to open and close said ports in sequence.

5. ln an explosion engine, the combination of a crank case forming a compression chamber, a cylinder constituting the eX plosion chamber and having inlet and exhaust ports, said crank case having an inlet and a transfer passage leading from tin` Crank casete the cylinder, and a slide valve controlling all of said ports.

6. In an explosion engine of the foureycle type, the combination of a crank case forming a compression chamber and having an inlet, a cylinder constituting the explosion chamber' and provided with inlet and exhaust ports arranged adjacent the head, there being a transfer port opening l 7. ln an l l l into the cylinder below the inlet and exhaust ports, and a slide valve controlling all of said ports.

explosion engine of the fourcycle type, the combination of a c ank ease forming a compression chamber and having an inlet, a cylinder .constituting the eX plosion chamber and provided with inlet and exhaust ports arranged adjacent the head there being a transfer port opening into the cylinder' below the inlet and exhaust ports, and a plurality of ported sleeves arranged intermediate the cylinder and piston and haring ports for controlling said inlet, exhaust and transfer ports.

In testimony whereof l aiiix my .in presence of two witnesses.

JOHN- G. `UTZ.

:ign'ature Witnesses Nieman KINSELLA, J AMES P. BARRY. 

